So I'm just getting into the zombies in Black Ops2 and wondering if there is a campaign mode? Is there a set of levels within Tranzit and Die Rise? Is there an end game or ending to the levels? Boss fights? What levels do I play to get the storyline?
Black Ops 2 has three zombie modes, with very little resembling a campaign mode.
Tranzit is a co-op multiplayer mode similar to some of the maps in Black Ops. There are some campaign elements in how you unlock areas/equipment by completing tasks, and hints about a back story as to why the world is a zombie filled corpse pile, but in my opinion it doesn't approach anything you'd call a campaign.
Another co-op mode, Survival is more of a straight up Horde made popular by the Gears of War series. Spoiler alert, you don't survive.
Grief is a new twist of a multiplayer versus/co-op mode. I haven't personally played this one, but it looks somewhat in the vein of the Left 4 Dead versus multiplayer, with some new Treyarch special sauce. Two teams face of, and only one will survive. Campaign elements: slim/none.